Freibergite
is a complex sulfide mineral consisting of silver, copper,
iron, antimony and arsenic. It forms a solid solution
series with Tetrahedrite and another with Argentotennantite.
Freibergite is opaque black with a metallic luster that
makes for very attractive gems.

Freibergite
is found at a number of localities worldwide. In
Germany, in Saxony, from the Freiberg district [TL],
as in the Himmelsfürst mine, Erbisdorf, near Freiberg.
From Kutná Hora and the Zlate Hore district, Czech
Republic. In Austria, from the Knappenstube mine, Hochtor,
Salzburg. From Yukhondzha, Sakha, Russia. At Slädekärr
and in the Vena mines, near Askersund, Örebro, Sweden.
From the Bleikvassli Zn–Pb–Cu deposit, Nordland, Norway.
In Scotland, at Tyndrum, Perthshire. In the Hi-Ho mine,
Cobalt-Gowganda region, Ontario; and the Keno Hill-Galena
Hill area, Yukon Territory, Canada. Large crystals from
the San José mine, Oruro, Bolivia. In Japan, in the
Inakuraishi, Koryu, and Sanru mines, Hokkaido. In Australia,
at Mt. Isa and the Cannington Ag–Pb–Zn deposit, Queensland;
and in the Meerschaum mine, north of Omeo, Victoria.
Additional localities are known.

Freibergite
gems for sale:

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